CN115415655B - Partial vacuum electron beam welding vacuum sealing system - Google Patents
Partial vacuum electron beam welding vacuum sealing system Download PDFInfo
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- CN115415655B CN115415655B CN202211295918.4A CN202211295918A CN115415655B CN 115415655 B CN115415655 B CN 115415655B CN 202211295918 A CN202211295918 A CN 202211295918A CN 115415655 B CN115415655 B CN 115415655B
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- 238000007789 sealing Methods 0.000 title claims abstract description 178
- 238000003466 welding Methods 0.000 title claims abstract description 141
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- IPJGAEWUPXWFPL-UHFFFAOYSA-N 1-[3-(2,5-dioxopyrrol-1-yl)phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C1=CC=CC(N2C(C=CC2=O)=O)=C1 IPJGAEWUPXWFPL-UHFFFAOYSA-N 0.000 description 3
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- BJELTSYBAHKXRW-UHFFFAOYSA-N 2,4,6-triallyloxy-1,3,5-triazine Chemical compound C=CCOC1=NC(OCC=C)=NC(OCC=C)=N1 BJELTSYBAHKXRW-UHFFFAOYSA-N 0.000 description 1
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- YSIUOTWIDXMASD-UHFFFAOYSA-N 4-[(3-ethenylphenyl)methoxy]-n-phenylaniline Chemical compound C=CC1=CC=CC(COC=2C=CC(NC=3C=CC=CC=3)=CC=2)=C1 YSIUOTWIDXMASD-UHFFFAOYSA-N 0.000 description 1
- LJMUXWGJPFMVAL-UHFFFAOYSA-N 4-[(4-ethenylphenyl)methoxy]-n-phenylaniline Chemical compound C1=CC(C=C)=CC=C1COC(C=C1)=CC=C1NC1=CC=CC=C1 LJMUXWGJPFMVAL-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
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- GFSJJVJWCAMZEV-UHFFFAOYSA-N n-(4-anilinophenyl)-2-methylprop-2-enamide Chemical compound C1=CC(NC(=O)C(=C)C)=CC=C1NC1=CC=CC=C1 GFSJJVJWCAMZEV-UHFFFAOYSA-N 0.000 description 1
- HKLPOBRVSAUJSG-UHFFFAOYSA-N n-(4-anilinophenyl)prop-2-enamide Chemical compound C1=CC(NC(=O)C=C)=CC=C1NC1=CC=CC=C1 HKLPOBRVSAUJSG-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K15/00—Electron-beam welding or cutting
- B23K15/06—Electron-beam welding or cutting within a vacuum chamber
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Welding Or Cutting Using Electron Beams (AREA)
Abstract
The invention provides a partial vacuum electron beam welding vacuum sealing system, which comprises: the local sealing device comprises a sealing plate, the sealing plate is fixed relative to the electron beam welding gun, and a sealing space is formed between the position of the electron beam welding gun and a workpiece to be welded; an electron beam welding gun, wherein the electron beam current of the electron beam welding gun can penetrate through the local sealing device to weld the workpieces to be welded; the transition pipeline device is arranged between the electron beam welding gun and the local sealing device, one end of the transition pipeline device is communicated with the vacuum unit, and the other end of the transition pipeline device is communicated with the sealing space. The partial vacuum electron beam welding vacuum sealing system ensures the sealing performance of partial vacuum electron beam welding by forming a sealing space inside the partial sealing device 3, and greatly improves the use reliability of the partial vacuum electron beam welding vacuum sealing system.
Description
Technical Field
The invention relates to the technical field of electron beam welding, in particular to a partial vacuum electron beam welding vacuum sealing system.
Background
With the increasing importance of ocean rights and interests and the increasing development of ocean resources in various countries in the world, the novel ship manufacturing, the ocean oil exploitation and the large-scale wind driven generator manufacturing are rapidly developed, the welding demand of large-thickness and large-scale workpieces is increased, and the welding process of the large-thickness workpieces and the large-scale workpieces is mainly conventional argon arc welding, submerged arc welding and the like at present.
The partial low vacuum electron beam welding is a fusion welding method which is rapidly developed along with the development of modern science and technology, the electron beam has very high energy density, the depth-to-width ratio of a welding line is high and can reach 15:1, a heat affected zone is small, the deformation of a workpiece is small, crystal grains are fine and the like, the thickness of welded metal is from 1 to 150mm, grooves are not formed, welding wires are not added generally, and the welding line is welded at one time and has good quality, which cannot be achieved by other welding methods.
However, in general, such welders are characterized by placing the workpieces to be welded as a whole in a vacuum chamber to avoid the effects of gas ionization on the electron beam power and weld performance, and thus may be referred to as a full vacuum chamber electron beam welding apparatus. The power of the welding can reach more than 30kW at present, the volume of a vacuum chamber is as high as tens of cubic meters or even hundreds of cubic meters, and due to the high manufacturing cost of the equipment, many enterprises cannot bear the great economic expense. For welding of large-size welding parts for ship systems, the full-vacuum sealed welding equipment can cause huge equipment and very high cost, meanwhile, the full-sealed vacuum electron beam welding vacuum chamber can generate smoke during welding, so that a great amount of energy loss can be caused during electron beam transmission, penetration depth is influenced, the prior art discloses a method for realizing workpiece low-vacuum electron beam welding by adopting a moving workpiece during partial vacuum welding, for example, an electron gun adopted by the partial low-vacuum electron beam welding technology of TWI in the United kingdom is a high-voltage electron gun for generating electrons by adopting radio frequency excitation, the electron beam welding is carried out in a sealed small-sized drag cover with the vacuum degree of 1mbar, but the structure of the movable drag cover is complex, a general working mode is that a large-sized workpiece is clung to the periphery of the drag cover, the design and manufacture difficulty of the partial low-vacuum movable sealed drag cover of the structure is relatively high, and the size constraint on the parts is relatively high, otherwise, the vacuum degree in the movable drag cover is extremely easy to cause insufficient for meeting the requirement of electron beam welding, and the popularization of the application of the partial vacuum electron beam welding technology is unfavorable.
Disclosure of Invention
In view of the above, the present invention aims to provide a vacuum sealing system for partial vacuum electron beam welding, which solves the technical problem that in the prior art, partial vacuum electron beam welding is limited by the size of a welding piece, and can better solve the sealing problem of a large-size welding piece in the electron beam welding process, so that the metal large-size welding piece can realize partial vacuum electron beam welding, thereby improving the welding quality and reducing the welding deformation.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
a partial vacuum electron beam welding vacuum sealing system, comprising:
the local sealing device comprises a sealing plate, the sealing plate is fixed relative to the electron beam welding gun, and a sealing space is formed between the position of the electron beam welding gun and a workpiece to be welded;
an electron beam welding gun, wherein the electron beam current of the electron beam welding gun can penetrate through the local sealing device to weld the workpieces to be welded;
the transition pipeline device is arranged between the electron beam welding gun and the local sealing device, one end of the transition pipeline device is communicated with the vacuum unit, and the other end of the transition pipeline device is communicated with the sealing space.
Further, the transition pipeline device comprises a transition pipeline, an evaporation prevention pipe is arranged at the center of the upper end of the transition pipeline, a pipe cavity through which electron beam flows pass is formed inside the evaporation prevention pipe, a first cavity is formed between the inner wall of the transition pipeline and the outer wall of the evaporation prevention pipe, the first cavity is communicated with the inner space of the local sealing device, a suction pipeline is arranged on the outer side of the transition pipeline, one end of the suction pipeline is communicated with the first cavity, and the other end of the suction pipeline is communicated with the vacuum unit.
Further, at least two suction pipelines are arranged, and the two suction pipelines are connected with the transition pipeline through the transition connector.
Further, the suction pipeline comprises a first suction pipe, a conversion joint and a second suction pipe, wherein the first suction pipe and the second suction pipe are arranged at two opposite ends of the conversion joint, and the conversion joint forms a 90-degree included angle in the horizontal direction at two ends.
Further, a first through hole and a second through hole are formed in the sealing plate, a sealing sleeve is arranged at one end, far away from the electron beam welding gun, of the sealing plate, the first through hole is assembled with the transition pipeline in a sealing mode, the second through hole is formed between the sealing sleeve and the first through hole, and the second through hole is communicated with the transition pipeline.
Further, the sealing sleeve comprises a sealing ferrule, and a hollow deformation cavity is arranged in the cross section direction of the sealing ferrule.
Furthermore, the evaporation preventing pipe stretches into the first through hole, a communication groove is formed in one side, far away from the electron beam welding gun, of the sealing plate, and two ends of the communication groove are respectively communicated with the first through hole and the second through hole.
Further, a communication branch pipe is fixed at the position where the second through hole is formed in the sealing plate, the communication branch pipe is communicated with the first suction pipe, the communication branch pipe is perpendicular to the first suction pipe, and the communication branch pipe and the first suction pipe are integrally formed.
Further, the second through holes are symmetrically arranged on the sealing plate along the central axis of the first through hole.
Further, keep away from on the closing plate one side of electron beam welding gun sets up first holding tank and second holding tank, first holding tank and second holding tank all are confined cyclic annular setting, just the center of first holding tank the center of second holding tank with the center coincidence of closing plate, the seal cover includes first sealing ring and second sealing ring, the second sealing ring with first holding tank interference fit, first sealing ring with second holding tank interference fit.
Compared with the prior art, the partial vacuum electron beam welding vacuum sealing system has the following advantages:
(1) According to the partial vacuum electron beam vacuum sealing system, the transition pipeline device is arranged between the electron beam welding gun and the partial sealing device, so that on one hand, smoke generated in the partial sealing device during welding of the electron beam welding gun is pumped, on the other hand, the vacuum state of the inner space of the partial sealing device can be timely supplemented and improved, and the reliability of the partial vacuum electron beam vacuum sealing system during welding is further improved.
(2) According to the partial vacuum electron beam vacuum sealing system, the sliding pressing plate is arranged on one side, close to the transition pipeline device, of the sealing plate, pressure can be applied to the lower end face of the partial sealing device, so that the welding seam area is covered by the smaller partial sealing device, the electron beam is located in the partial vacuum of the welding seam area, the welding characteristics of the vacuum electron beam are maintained, a huge vacuum chamber is avoided, the sealing effect on the vacuum environment during electron beam welding is improved, and the welding efficiency and quality can be greatly improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic side view of a partial vacuum electron beam vacuum sealing system according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of an electron beam welding gun, a transition duct assembly, a sliding platen, and a partial seal assembly according to an embodiment of the present invention;
FIG. 3 is a schematic side view of the structure of FIG. 2;
FIG. 4 is a schematic side view of the structure of FIG. 2 from a second perspective;
FIG. 5 is a schematic diagram of an exploded construction of the structure of FIG. 2;
FIG. 6 is a schematic view of an exploded view of the structure of FIG. 2 from a second perspective;
FIG. 7 is a schematic side view of a seal plate according to an embodiment of the present invention;
FIG. 8 is a schematic side view of a sealing plate according to a second embodiment of the present invention;
FIG. 9 is a schematic cross-sectional view of a seal ring according to an embodiment of the present invention;
reference numerals illustrate:
1-an electron beam welding gun; 2-a transition duct arrangement; 21-a transition duct; 2101-a first chamber; 22-suction duct; 221-a first suction tube; 222-adapter; 223-a second suction tube; 23-a transitional connector; 24-an evaporation preventing pipe; 241-lumen; 25-communicating branch pipes; 3-a partial sealing device; 31-a sealing plate; 3101—a first through hole; 3102-a second through hole; 3103-a communication groove; 3104-a first receiving slot; 3105-a second receiving slot; 32-sealing sleeve; 321-a sealing collar; 322-deformation cavity; 3201—a first seal ring; 3202-a second seal ring; 4-a sliding device; 5-a pressure device; 501-a sliding pressing plate; 5101-a third through hole; 6-a base.
Detailed Description
In order to facilitate understanding of the technical means, objects and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
It is to be noted that all terms used for directional and positional indication in the present invention, such as: "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "top", "low", "lateral", "longitudinal", "center", etc. are merely used to explain the relative positional relationship, connection, etc. between the components in a particular state (as shown in the drawings), and are merely for convenience of description of the present invention, and do not require that the present invention must be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
As shown in fig. 1 to 8, the present invention discloses a partial vacuum electron beam welding vacuum sealing system, comprising:
the local sealing device 3 comprises a sealing plate 31, the sealing plate 31 is fixed relative to the electron beam welding gun 1, and the local sealing device 3 forms a sealing space with a workpiece to be welded at the position of the electron beam welding gun 1;
an electron beam welding gun 1, wherein the electron beam current of the electron beam welding gun 1 can penetrate through the local sealing device 3 to weld workpieces to be welded;
the transition pipeline device 2 is arranged between the electron beam welding gun 1 and the local sealing device 3, one end of the transition pipeline device 2 is communicated with the vacuum unit, and the other end of the transition pipeline device 2 is communicated with the sealing space.
It was found in the course of research that for partial vacuum electron beam welding of large-sized pipe fittings for marine systems, the sealing performance of the welding space around the electron beam welding gun 1 is a great importance in realizing the vacuum welding thereof, but because of the long weld formed by the electron beam welding gun 1 on the workpieces to be welded, the weld may need to pass through the partial sealing device 3, and the temperature of the weld after welding is extremely high, the structural change and the high-temperature environment are extremely liable to damage the partial sealing device 3, thereby affecting the sealing performance of the welding space around the electron beam welding gun 1. Through improving partial vacuum electron beam vacuum seal system, set up electron beam welding gun 1 and partial sealing device 3 into the structure fixed relative to base 6, in the welding process, through set up a transition pipeline device 2 that is linked together with the vacuum unit between electron beam welding gun 1 and partial sealing device 3, the flue gas that produces in partial sealing device 3 when being used for sucking electron beam welding gun 1 to weld on the one hand, on the other hand also can in time supplement the vacuum state of improving partial sealing device 3 inner space, further promote the reliability of partial vacuum electron beam vacuum seal system when welding.
As a preferred example of the present invention, the transition duct apparatus 2 includes a transition duct 21, an evaporation preventing tube 24 is disposed at the center of the upper end of the transition duct 21, a tube cavity 241 through which electron beam passes is formed inside the evaporation preventing tube 24, a first chamber 2101 is formed between the inner wall of the transition duct 21 and the outer wall of the evaporation preventing tube 24, the first chamber 2101 is communicated with the inner space of the partial sealing apparatus 3, a suction duct 22 is disposed at the outer side of the transition duct 21, one end of the suction duct 22 is communicated with the first chamber 2101, and the other end is communicated with a vacuum unit.
A first chamber 2101 is formed between the inner wall of the transition pipeline 21 and the outer wall of the vapor deposition preventing pipe 24 and is used for vacuumizing a sealed space formed by the local sealing device 3, so that a low vacuum environment for electron beam welding by the electron beam welding gun 1 is ensured, the vapor deposition preventing pipe 24 is arranged at the center of the upper end of the transition pipeline 21 and is used for generating electron beam flow by the electron beam welding gun 1, and the electron beam flow emitted by the electron beam welding gun 1 is emitted to a welding position of a workpiece to be welded through a pipe cavity 241, so that the reliability of electron beam welding by the electron beam welding gun 1 is ensured.
As a preferred example of the invention, at least two suction pipes 22 are provided, and two suction pipes 22 are connected to the transition pipe 21 by a transition joint 23. As an example of the present invention, the suction duct 22 includes a first suction duct 221, a switching joint 222, and a second suction duct 223, the first suction duct 221 and the second suction duct 223 are disposed at opposite ends of the switching joint 222, and the switching joint 222 is inclined at 90 ° in a horizontal direction at both ends. As an example of the invention, two of the suction pipes 22 are symmetrically arranged on opposite sides of the transition pipe 21, and two of the second suction pipes 223 are disposed toward the same side of the central axis of the transition pipe 21.
The arrangement ensures that the suction structure of the transition pipeline device 2 is simplified, on one hand, the processing and the assembly of the transition pipeline device 2 are convenient, the vacuum pipeline device can be applied to various application scenes, meanwhile, the vacuum unit can be used for rapidly extracting the vacuum of the sealing space formed by the local sealing device 3, and the application reliability and the application applicability of the local vacuum electron beam welding device are improved.
As a preferred example of the present invention, a first through hole 3101 and a second through hole 3102 are provided in the sealing plate 31, a sealing sleeve 32 is provided at an end of the sealing plate 31 remote from the electron beam welding gun 1, the first through hole 3101 is sealed with the transition duct 21, the second through hole 3102 is provided between the sealing sleeve 32 and the first through hole 3101, and the second through hole 3102 communicates with the transition duct 21.
The second through hole 3102 communicated with the transition pipeline 21 is arranged on the sealing plate 31 and is used for extracting smoke generated in the local sealing device 3 during welding of the electron beam welding gun 1, so that the effect of welding the electron beam is prevented from being influenced by the smoke, and the use reliability of the local vacuum electron beam welding vacuum sealing system is further improved.
As a preferable example of the present invention, the vapor deposition preventing pipe 24 extends into the first through hole 3101, a communication groove 3103 is provided in the sealing plate 31 at a side away from the electron beam welding gun 1, and both ends of the communication groove 3103 are respectively communicated with the first through hole 3101 and the second through hole 3102.
This setting is through carrying out institutional advancement to local sealing device 3, guarantees on the one hand that the inside sealed space that forms of local sealing device 3 carries out the reliability of partial vacuum electron beam welding, on the other hand has further improved the reliability that transition pipeline device 2 suction electron beam welding gun 1 produced the flue gas during operation, guarantees welding quality.
As a preferred example of the present invention, a communication branch pipe 25 is fixed to the sealing plate 31 at a position where the second through hole 3102 is provided, the communication branch pipe 25 communicates with the first suction pipe 221, and the communication branch pipe 25 is provided perpendicular to the first suction pipe 221. Preferably, the communication branch pipe 25 is integrally formed with the first suction pipe 221.
This arrangement further ensures the reliability of the smoke generated when the electron beam welding gun 1 is operated by the transition duct device 2, and at the same time simplifies the production and connection process of the first suction duct 221, reducing the cost.
As a preferred example of the present invention, the second through holes 3102 are symmetrically arranged in two on the sealing plate 31 along the central axis of the first through hole 3101. Correspondingly, two communication grooves 3103 are provided, and the two communication grooves 3103 are used for communicating the two second through holes 3102 with the first through hole 3101, respectively.
On the one hand, the arrangement is that smoke is generated in the sealed space when the electron beam welding gun 1 is sucked through the two symmetrically arranged communicating branch pipes 25, meanwhile, the phenomenon that the welding quality of the electron beam welding gun 1 is influenced by uneven air flow in the sealed space is avoided, and the use reliability of the partial vacuum electron beam welding vacuum sealing system is further improved.
As a preferred example of the present invention, a first receiving groove 3104 and a second receiving groove 3105 are provided on a side of the sealing plate 31 away from the electron beam welding gun 1, the first receiving groove 3104 and the second receiving groove 3105 are each provided in a closed ring shape, a center of the first receiving groove 3104, a center of the second receiving groove 3105 and a center of the sealing plate 31 coincide, the sealing sleeve 32 includes a first sealing ring 3201 and a second sealing ring 3202, the second sealing ring 3202 is in interference fit with the first receiving groove 3104, and the first sealing ring 3201 is in interference fit with the second receiving groove 3105.
By arranging the inner sealing ring and the outer sealing ring on one side, far away from the electron beam welding gun 1, of the sealing plate 31, the tightness of a sealing space formed by the position of the electron beam welding gun 1 and a workpiece to be welded by the local sealing device 3 is further improved, the vacuum degree of the welding position of electron beam welding in use is ensured, and the quality of electron beam welding is improved.
According to the partial vacuum electron beam welding vacuum sealing system, the adopted sealing sleeve 32 can rapidly detect the sealing performance of the high-temperature-resistant mobile plastic sealing and different surfacing heights through the independent development of the high-temperature sealing material testing system for partial vacuum electron beam welding by the applicant, so that the detected sealing elements can be applied to different working conditions, and the sealing materials suitable for partial vacuum electron beam welding can be determined to be applied to the sealing sleeve 32 in the linear butt-joint metal part partial vacuum electron beam welding system according to the detection.
The applicant has further found in research that nitrile rubber (NBR) is a copolymer of butadiene and acrylonitrile which has good oil resistance, abrasion resistance, heat resistance and adhesion, and is the most commonly used raw material for sealing rubber, but nitrile rubber seals produced by different modification and processing processes generally also have different properties. For seals used in vacuum electron beam welding to have high wear resistance, high temperature resistance, and high elasticity and strength, the components of the seal sleeve 32 of the present invention include:
100 parts of nitrile rubber copolymer; in the present invention, the nitrile rubber copolymer is produced by copolymerizing an α, β -ethylenically unsaturated monocarboxylic acid alkyl ester monomer or an α, β -ethylenically unsaturated monocarboxylic acid alkoxyalkyl ester monomer; the Mooney viscosity (ML1+4, 100 ℃) of the nitrile rubber copolymer is preferably 35 to 65.
The method for producing the nitrile rubber copolymer rubber used in the present invention is not particularly limited, and it can be produced by copolymerizing the above monomers and, if necessary, hydrogenating the carbon-carbon double bonds in the resulting copolymer. The polymerization method is not particularly limited, and any polymerization auxiliary material commonly used in addition to an emulsifier, a polymerization initiator, and a molecular weight regulator can be used in the polymerization according to a known emulsion polymerization method or solution polymerization method.
35-55 parts of liquid nitrile rubber modified carbon black; the liquid nitrile rubber modified carbon black is obtained by reacting amino-terminated liquid nitrile rubber with carbon black treated by an epoxy silane coupling agent;
3-5 parts of composite vulcanizing agent; the compound vulcanizing agent comprises sulfur, dicumyl peroxide and N, N' -m-phenylene bismaleimide (HVA-2);
1-3 parts of a copolymerizable anti-aging agent; wherein the copolymerizable anti-aging agent comprises N- (4-anilinophenyl) acrylamide, N- (4-anilinophenyl) methacrylamide, N- (4-anilinophenyl) cinnamamide, N- (4-anilinophenyl) crotonamide, N-phenyl-4- (3-vinylbenzyloxy) aniline, N-phenyl-4- (4-vinylbenzyloxy) aniline and the like;
1-3 parts of accelerator; wherein the accelerator preferably comprises one or more of triallyl cyanurate, triallyl isocyanurate and m-phenylene bismaleimide.
In preparing the gland 32, the nitrile rubber copolymer, nitrile rubber modified carbon black, amine cross-linking agent, copolymerizable anti-aging agent and accelerator are kneaded or extruded. Preferably, the sealing sleeve 32 is obtained by extruding the sealing sleeve 32 through a special die, as shown in fig. 9, the to-be-detected piece prepared by the scheme can be continuously formed, the cost is low, the efficiency is high, and meanwhile, the product yield is improved, the sealing sleeve 32 comprises a sealing sleeve 321, a hollow deformation cavity 322 is arranged in the cross section direction of the sealing sleeve 321, and preferably, the deformation cavity 322 is any one or more of round, diamond or regular polygon structures, and the whole elastic deformation performance of the sealing sleeve 32 is further improved by arranging the hollow deformation cavity 322 in the sealing sleeve 321.
As a preferred example of the present invention, a sliding pressure plate 501 is provided on a side of the sealing plate 31 close to the electron beam welding gun 1, and the sliding pressure plate 501 is capable of changing the pressure of sealing contact with the lower end surface of the partial sealing device 3 under the action of the driving device of the pressure device 5. The sliding platen 501 is provided with a third through hole 5101, and the transition pipe 21 passes through the third through hole 5101 and is fixedly connected with the upper surface of the sealing plate 31 in a sealing manner.
The applied pressure value of the pressure device 5 is adjusted according to the performance of the local sealing device 3, so that the position of the local sealing device 3 where the sealing sleeve 32 is arranged always keeps a tight fit state in the welding process, and the sealing failure caused by the fact that a welded seam of a workpiece to be welded passes through the local sealing device 3 is avoided, and the welding efficiency and reliability of the electron beam welding gun 1 are reduced.
The invention also discloses a partial vacuum electron beam welding device, which comprises the partial vacuum electron beam welding vacuum sealing system and a base 6, wherein a processing area of an electron beam welding workpiece is formed above the base 6, the partial sealing device 3 is fixed relative to the base 6, a sliding device 4 is arranged on the upper plane of the base 6, the sliding device 4 can drive a welding piece to move relative to the partial sealing device 3, a sealing space is formed at the joint of a sealing sleeve 32 in the partial sealing device 3 and the sliding device 4 or the workpiece to be welded, and a pressure device 5 is also arranged on the base 6, and the pressure device 5 can change the pressure of the sealing sleeve 32 and the sliding device 4 or the workpiece to be welded at the joint, so that the sealing performance of the partial vacuum electron beam welding vacuum sealing system in use is further improved. As an example of the present invention, the pressure device 5 includes a sliding pressure plate 501, the sliding pressure plate 501 is disposed on a side of the sealing plate 31 near the transition duct device 2, a third through hole 5101 is disposed at a center of the sliding pressure plate 501, and the transition duct 21 is connected to the sealing plate 31 through the third through hole 5101.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (6)
1. A partial vacuum electron beam welding vacuum sealing system, comprising:
the local sealing device (3) comprises a sealing plate (31), the sealing plate (31) is fixed relative to the electron beam welding gun (1), and the local sealing device (3) and a workpiece to be welded form a sealing space at the position of the electron beam welding gun (1);
an electron beam welding gun (1), wherein the electron beam current of the electron beam welding gun (1) can penetrate through the local sealing device (3) to weld workpieces to be welded;
the transition pipeline device (2) is arranged between the electron beam welding gun (1) and the local sealing device (3), one end of the transition pipeline device (2) is communicated with the vacuum unit, and the other end of the transition pipeline device (2) is communicated with the sealing space;
the transition pipeline device (2) comprises a transition pipeline (21), an evaporation prevention pipe (24) is arranged at the center of the upper end of the transition pipeline (21), a pipe cavity (241) through which electron beam passes is formed inside the evaporation prevention pipe (24), a first cavity (2101) is formed between the inner wall of the transition pipeline (21) and the outer wall of the evaporation prevention pipe (24), the first cavity (2101) is communicated with the inner space of the local sealing device (3), a suction pipeline (22) is arranged at the outer side of the transition pipeline (21), one end of the suction pipeline (22) is communicated with the first cavity (2101), and the other end of the suction pipeline (22) is communicated with a vacuum unit;
a first through hole (3101) and a second through hole (3102) are formed in the sealing plate (31), a sealing sleeve (32) is arranged at one end, far away from the electron beam welding gun (1), of the sealing plate (31), the first through hole (3101) is assembled with the transition pipeline (21) in a sealing mode, the second through hole (3102) is arranged between the sealing sleeve (32) and the first through hole (3101), and the second through hole (3102) is communicated with the transition pipeline (21);
the evaporation preventing pipe (24) extends into the first through hole (3101), a communication groove (3103) is formed in one side, far away from the electron beam welding gun (1), of the sealing plate (31), and two ends of the communication groove (3103) are respectively communicated with the first through hole (3101) and the second through hole (3102);
the composition of the sealing sleeve (32) comprises: 100 parts of nitrile rubber copolymer; the nitrile rubber copolymer is prepared by copolymerizing an alpha, beta-ethylenically unsaturated monocarboxylic acid alkyl ester monomer or an alpha, beta-ethylenically unsaturated monocarboxylic acid alkoxyalkyl ester monomer; the Mooney viscosity ML1+4 of the nitrile rubber copolymer at 100 ℃ is 35-65, and the nitrile rubber copolymer further comprises: 35-55 parts of liquid nitrile rubber modified carbon black, 3-5 parts of composite vulcanizing agent, 1-3 parts of copolymerization anti-aging agent and 1-3 parts of accelerator, and during the preparation of the sealing sleeve (32), mixing or extrusion molding the nitrile rubber copolymer, the nitrile rubber modified carbon black, the amine cross-linking agent, the copolymerization anti-aging agent and the accelerator;
the sealing sleeve (32) comprises a sealing ferrule (321), and a hollow deformation cavity (322) is arranged in the cross section direction of the sealing ferrule (321);
the side, close to the electron beam welding gun (1), of the sealing plate (31) is provided with a sliding pressing plate (501), and the sliding pressing plate (501) can change the pressure of sealing contact of the lower end face of the partial sealing device (3) under the action of a driving device of the pressure device (5).
2. A partial vacuum electron beam welding vacuum sealing system according to claim 1, characterized in that at least two of the suction ducts (22) are provided, both suction ducts (22) being connected to a transition duct (21) by means of a transition joint (23).
3. A partial vacuum electron beam welded vacuum sealing system according to claim 2, wherein the suction conduit (22) comprises a first suction conduit (221), a transition joint (222) and a second suction conduit (223), the first suction conduit (221) and the second suction conduit (223) being arranged at opposite ends of the transition joint (222), the transition joint (222) being at an angle of (90) ° in the horizontal direction at both ends.
4. A partial vacuum electron beam welding vacuum sealing system according to claim 3, wherein a communication branch pipe (25) is fixed at a position where the second through hole (3102) is provided in the sealing plate (31), the communication branch pipe (25) communicates with the first suction pipe (221), the communication branch pipe (25) is provided perpendicularly to the first suction pipe (221), and the communication branch pipe (25) is integrally formed with the first suction pipe (221).
5. Partial vacuum electron beam welding vacuum sealing system according to claim 1 or 4, characterized in that the second through hole (3102) is symmetrically arranged on the sealing plate (31) along the central axis of the first through hole (3101).
6. The partial vacuum electron beam welding vacuum sealing system of claim 5, wherein a first receiving groove (3104) and a second receiving groove (3105) are formed in the sealing plate (31) on a side away from the electron beam welding gun (1), the first receiving groove (3104) and the second receiving groove (3105) are all formed in a closed annular shape, the center of the first receiving groove (3104), the center of the second receiving groove (3105) are coincident with the center of the sealing plate (31), the sealing sleeve (32) comprises a first sealing ring (3201) and a second sealing ring (3202), the second sealing ring (3202) is in interference fit with the first receiving groove (3104), and the first sealing ring (3201) is in interference fit with the second receiving groove (3105).
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| CN113474399A (en) * | 2019-03-14 | 2021-10-01 | Sika技术股份公司 | Thermally expandable composition and use thereof in weld sealing tapes |
| WO2022179767A1 (en) * | 2021-02-25 | 2022-09-01 | Fachhochschule Aachen | Method for welding using a mobile vacuum chamber |
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| US5170028A (en) * | 1989-08-28 | 1992-12-08 | Hitachi, Ltd. | Process and apparatus, for electron beam welding of a member partially enclosed in vacuum chamber, and the member formed thereby |
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| CN103231168A (en) * | 2013-04-26 | 2013-08-07 | 中国东方电气集团有限公司 | Device for vacuum laser welding |
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